The SC situation was pretty clearly very bad on the cop's part, but I didn't notice anything to make me think the cop wanted to shoot a black person that day. The driver might have been white and had the same thing happen. And as noted, this is from 8 years ago. I don't fault the driver for that either. It's certainly a good idea to avoid reaching for anything when a cop if interacting with you without explaining your actions, but it's not "required" in any sense.
So, even this situation is rare.
As for cops pointing guns at people more frequently now, that's just a baseless allegation.